chin, is the extreme
convex form. The hammock-shaped face, with high, prominent forehead, flat
brows, deep-set eyes, small snubbed or sway-back nose, retreating teeth
and long, prominent chin, is the extreme concave in form of profile.

It would involve much dry, technical writing to explain in detail the
scientific reasons why the extreme convex in profile indicates extreme
energy, quickness, impatience, impulsiveness, keenness and alertness of
intellect, and great rapidity in action. The large nose, high in the
bridge, however, indicating, as you have already seen, great energy, is
one of the scientific reasons for this. In a similar way it would take me
too long to tell in detail why the extreme concave of profile indicates
just the opposite qualities.

It is a scientific fact that that which is sharp is penetrating and moves
quickly; that which is blunt is non-penetrating and of necessity moves
slowly. The needle darts through the cloth more quickly than the bodkin.
The greyhound is swifter than the bulldog. The stiletto does quicker work
than the bludgeon. This, of course, is only a symbolism which may make
vivid the truth that the convex man works more rapidly than the concave.

In commercial work, the man who is successful in positions requiring quick
decision and quick action has a convex profile, while the man whose duties
call for patience, deliberation, reflection, and the ability to plod
should have some modification of the concave form of profile.

SIZE

It is an old saying that large bodies move slowly. It would be more
scientifically correct to say that large bodies get under way slowly.
Difference in physical size between men is important in many ways. If, as
William James says, "the causes of emotion are indubitably physiological,"
then the smaller the physical bulk which must be affected in order to have
an intense emotion, the more quickly and easily is that intense emotion
aroused.

Other things being equal, the small man is more excitable and becomes
angry more easily than the large man. He also cools down more quickly.
When the huge bulk of the big man becomes thoroughly aroused, thoroughly
wrought up, it is time to get out of the way and stand from under.

STRUCTURE

Hall Caine, the novelist, has an immense head, a slender jaw, and a small,
fragile body. James J. Jeffries, the pugilist, has a comparatively small
head, a large jaw, and huge bones and muscles. Ex-President Taft has a
compar